Valve stem



y 20, 1941- J. c. cRbwLEY 2,242,569

VALVE STEM Original Filed Aug. '7. 1936 I I/ I/I/ I I l 1" //l I l/ ll/ 1 INVENTOR.

Jon/v C. CEOM/LEY ATTORNEYS I rarehie uayzo, i941 f I 2,242,569-

1 3 g l 1-'VALVE:STEM' V ,Jolin cicrq eijc eveiana ights, Ohio, assignor to The Dill Manufacturing Company, Cleve- I land, Ohio; acorporatlon of Ohio Original application [August 1,1936, Serial No.

94,765. Divided and this application March 21,

" ISQQJSerial: No. 325,215

, v "1 lClaim.z (01.152-429) "invention relates to a valve stein for use from each point through the stem and the base with pneumatic'tires and other inflatable articles "thereof. When the stem H has been molded and particularly to a rubber valve stem. uponthe member l0 the valve spring I8 and the This application is a division of application valve l9 are passed inwardly of the member I Serial No. 94,765, filed August '7, 1936. from the outer end 01' the stem and pushed An object of the invention is to provide a rubthrough the conical portion ii of the rubber 1mbervalve stem for pneumatic tires or other ining i2, it being understood that said portion can fiatable articles and which stem may be vulcanflex and the opening therein be expanded to allow ized to the tire or article and will have the usual the insertion of the valve spring and valve. .The advantages of a rubber valve stem, but at the 10 spring I8 abuts at its lower end the bottom of same time-will be so formed as not to balloon or the counterbore IS in the stern, while its upper bulge under air pressures. end. of course, abuts the valve is. When the Another object is to provide a rubber valve valve and spring have been thus positioned a secstem wherein the usual valve insides or core does ondary reenforcing' member 20 is assembled with not need to be employed since the seat for the the other parts of the stem. The member has valve is formed by a. portion of the stem itself. an enlarged externally threaded-portion M which Another object is to provide a rubber valve screws into the threaded portion ll of the meme stem of the character above specified wherein the be! Ill. The member 20 also has a reduced exvalve seat that is structurally part of the stem temally threaded portion 22 at its outer end and may be formed of softer or different rubber than 20 upon which a valve cap 23 can be screwed. The the stem yet is of suftlcient rigidity or is so remember 20 is provided with a bore'2l which terenforced that the air pressures will not cause minates at its inner end in a conical enlargethe valve to distend the seat with the possibility ment 25. a i that the valve might blow out of the stem. The member 20 is screwed into the member ll Another object is to provide a rubber valve 25 until the conical enlargement 25 of the bore 24 stem which is simple in construction, eflicient in tightly engages the conical portion ll of the ruboperation, and which can be readily manuiacber lining I 2 in the member ID and reentorces tured and the valve assembled therein. said portion which then acts as the valve seat.

Further and additional objects and advantages It will be noted that the valve seat, due to the not hereinbefore specified will become apparent engageme o t e memb 0 wi h e po tion hereinafter during the detailed description of an 13 oi. the rubber lining, is sufficiently still to embodiment of the invention which is illustrated prevent the valve l9 from pushing outwardly in the accompanying drawing wherein, through the conical portion l3 of the rubber Fig. 1 is a sectional view on an enlarged scale lining. z'

4 through the valve stem embodying the invention, The valve pin 26 for depressing the valve I! and from the seat formed by theportion l3 of the i Fig. 2 is a sectional view showing certain of rubber lining when it is desired to inflate or dethe elements of the stem shown in Fig. 1 and arflate the article to which the 'stem is attached exranged in separated relationship. tends upwardly through the bore 24 in the mem- In the valve stem shown in the drawing the 40 ber 20 and its function will be well understood in member 10 is a reenforcing member and, prior the art. to'its final assembly in the stem, is a Straight The member I0 is of such length that when it cylindrical member having one end thereof interis mounted in the valve stem M the member will nally threaded as indicated at H. A rubber linextend beyond the outer end of the stem, and ing I 2 is molded in the member I0 and extends thus when the member r20 has been tightly from the unthreaded end thereof to adjacent screwed into position to reenforce and back up the inner end of the threaded portion H, at which t v v ea as a been pr v s y depoint the rubber lining is of conical formation as scribed, the outwardly extending endof the memindicated at l3. r 'ber Hi can be bent over into tight engagement The member in with its rubber lining i2 is with the shoulder formed between the portions molded in a rubber valve stem N that is provided 2| and 22 of the member 20 as indicated at 21. with a counterbore of a diameter to receive the W e t s s taken P e t Will be Seen that member In, while at the lower end of the counthe mem r 0 is u ly l c d to the member terbore there is a short counterbore I5 ,which r I0 and inasmuch as the bent over end 21 of the communicates with a small bore l6 that extends member ID is brought into very tight engagement with the shoulder on member "said member is held against rotation relative to the member II. It will be seen that a rubber valve stem. em-

bodyina the present invention can be formed of relatively soft rubber, but due to the reentorcing members in thestem will not bulge under air pressures. It will also be seen that the stem is 7 provided with a seat formed as a structural'part oi the stem, thus eliminating the use or the usual valve insides or cores and, due to the fact that such seat is adequately reenforced or backed up,

there will be no danger oi the valve expanding the seat under air pressure and passing through.

the restricted orifice formed by the seat. It will also be noted that the stem provides for readily assembling the valve and its spring within'the stem, while the member I0 reentorces the stem substantially throughout the length thereof.

Although an embodiment of the, invention has been illustrated and described herein it should of various modifications, and adaptations within the scope of the appended claim,

Havin thus described my invention I claim: A rubber-valve stem having integralbase and stem portions, said stem portion being provided with an axially disposed bore, a rigid tubular reenforcing member secured in said bore and pro- .Jecting slightly \beyondthe outer end thereof. the outer end 06 said member being interiorly threaded, a rubber lining separate from the material of said stem molded to the interior 0! 10 said member and having the outer end thereof 7 adjacent the internally threaded portion 0! the memberand oi inwardly extending conical for-' *mation, and a second reenforcing member:

screwed into the threaded end of the first named l5 reeni'orcing member and provided with a conical recess interiltting the conical portion of the rubber lining whereby said second member acts to ,reenforce said conical portion of the rubber lining, said members having cooperating portions 20 forming an interlock therebetween'. be understood that the invention is susceptible JOHN c. caownnr. 

